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30661 (4166 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2030661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1011847150518445 4.0396e-08  
a 3.141850859475218 1.9254e-08 au
q 2.823943575523825 1.2759e-07 au
i 10.69811554995644 4.393e-06 deg
node 19.50400506277099 2.1611e-05 deg
peri 307.4966197069627 3.0239e-05 deg
M 204.7236726198646 2.3518e-05 deg
tp 2460077.863423518368
(2023-May-13.36342352)
0.000136 TDB
period 2034.120962259566
5.57
1.8698e-05
5.119e-08
d
yr
n .1769806253803611 1.6269e-09 deg/d
Q 3.459758143426611 2.1202e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1470  
   data-arc span      18263 days (50.00 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52528  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:30:53  

Additional Information
 Earth MOID = 1.82751 au 
 Jupiter MOID = 1.97412 au 
 T_jup = 3.175 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.78   n/a MPCxxxxx  
diameter diameter 9.531 km 0.322 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30661 (4166 T-1)          Discovered 1971-Mar-26 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 4166 T-1 = 4271 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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